Anisotropic vortex lattice structures in the FeSe superconductor
Hsiang-Hsuan Hung, Can-Li Song, Xi Chen, Xucun Ma, Qi-kun Xue, Congjun Wu
DOI 10.1103/PhysRevB.85.104510 · Physical Review B
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Abstract
In the recent work by Song et al. [Science 332, 1410 (2011)], the scanning tunneling spectroscopy experiment in the stoichiometric FeSe revealed evidence for nodal superconductivity and strong anisotropy. The nodal structure can be explained with the extended s-wave pairing structure with the mixture of the sx2+y2 and sx2y2 pairing symmetries. We calculate the anisotropic vortex structure by using the self-consistent Bogoliubov–de Gennes mean-field theory. In considering the absence of magnetic ordering in the FeSe at ambient pressure, orbital ordering is introduced, which breaks the C4 lattice symmetry down to C2, to explain the anisotropy in the vortex tunneling spectra.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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